Brown noise
Brown noise is the most curious of all noises. Contrary to popular belief, this sound doesn’t get its name from the color but from the fact that it’s intimately related to the Brownian motion, a signal that describes the random pattern of movement that particles follow.
Arguably the buzziest of the entire group, brown noise has a lower frequency than white noise and dampened higher frequencies, making it seem less metallic. Researchers say that its distinctive sound positively impacts anyone who listens to it, as it soothes the mind and stimulates the brain.
